旋转喷头的水压周期控制与非圆形灌域的实现  

The Hydraulic Pressure Controlling Base on Plane Angle & the Realizing of Arbitrariness Shape Spray Irrigation Field

作　　者：阎勤劳[1] 郝建豹[1] 周金柱[1] 阎宁霞[2] 

机构地区：[1]西北农林科技大学机电工程学院 [2]西北农林科技大学水利与建筑工程学院

出　　处：《中国农机化》2004年第6期44-46,共3页Chinese Agricul Tural Mechanization

基　　金：863项目项目名称:雨水高效集蓄利用技术与行走式节水机具项目编号:2001AA242011-3

摘　　要：为了实现旋转喷头的任意形状喷灌域,本文将圆形域等分为n个扇形,然后分别控制各扇形的半径ri,可得到n个半径大小不同的扇形域,由这些大小不同的扇形域构成任意形状喷灌域。为此,在不同的扇形域内,采用不同的水泵转速ω实现各扇形域内的不同水压p和不同的喷射半径ri。为了实现喷灌精度的控制,采用了负反馈闭环控制技术,通过对喷射距离L检测来调节水泵转速ω以改变水压Pi最终获得较精确的喷射半径ri或喷灌域。For the sake of realizing the arbitrariness figure of the spraying irrigation, the roundness is divided to n equal sectors in angle, and then by controlling every radius, the n sector area of different radius can be obtained. It makes up an arbitrariness figure spraying irrigation. Therefore, disparate hydraulic pressure p is realized by controlling the corner velocity ω of water pump in all sectors and jet radius r is realized by controlling the different hydraulic pressure p. In precision controlling, the closed loop negative feed back technology is used, and the circumrotation corner velocity ω of water pump is adjusted by examining the range of spraying irrigation, and the hydraulic pressure is adjusted, then accurate jet radii r is obtained finally. The structure of system, controlling arithmetic and program are introduced briefly.

关 键 词：旋转喷头 水压周期控制 非圆形灌域 任意形状喷灌域 喷灌机械 

分 类 号：S277.94[农业科学—农业水土工程]